FIELD: oil producing industry, particularly, electric heaters applicable in recovery of paraffin and viscous oils. SUBSTANCE: induction heater comprises body, induction coil, contact unit with current supplying cable. Tubing pipe provided with metal slotted rings serves simultaneously as a heater body and magnet core. Laid through slots are induction coil wires. Coil is wound on heater body external surface. It is good practice to make induction coil with two layers and three windings of wires with heatproof insulation. EFFECT: higher temperature of recovered oil due to conversion of electric energy into heat energy and reduction of metal usage due to use of tubing pipe in capacity of electric heater body. 2 cl, 2 dwg
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